Objectives: To describe patterns of nonprescribed use of tranquilizers by students aged 10 to 18 years and assess the sociodemographic characteristics of these adolescents and their use of other substances. Methods: A randomized and stratified sample of 47. 979 students from state and private schools of the 27 Brazilian state capitals completed a self-report questionnaire. Poisson reg... https://www.seisukeknifes.shop/product-category/collections/